Samsung just can't catch a break these days. Its phones are exploding, and so are its washing machines, and now a security researcher has found a second vulnerability in Samsung Pay.

Salvatore Mendoza demonstrated the first vulnerability at Black Hat in August, where he was able to eavesdrop on a payment transaction, generate a token, and use that new token to make an unauthorized purchase in a different location.

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Next week, he will be demonstrating the new Samsung Pay vulnerability at the Ekoparty security conference in Buenos Aires, Argentina.

At Black Hat, he showed how an attacker could eavesdrop on the MST transmission that the Samsung phone sends to emulate a magnetic stripe signal and take advantage of a weakness in how the tokens were generated, allowing him to predict new tokens.